Cooling device and projector using the same

Abstract

A cooling device for projector includes a shell, a circuit board, a light machine, a first fins, a fan assembly and a heat dissipation module. The light machine is mounted on the circuit board, and includes a light source having a red LED, a green LED facing the red LED, and a blue LED positioned between both of them. The first fins are mounted on the light source adjacent to the blue LED. The fan assembly includes a fan having a fan shell with an inlet and an outlet, and a second fins connected to the light source to aligned with the red LED. The heat dissipation module includes a third fins mounted on the light source to align to the green LED, a fourth fins mounted on the fan shell to align to the outlet of the fan, and a heat pipe interconnecting the third and fourth fins.

1. A projector comprising:
 a shell; 
 a circuit board installed inside the shell; 
 a light machine mounted on the circuit board; the light machine comprising a light source which comprises a red LED, a green LED facing the red LED, and a blue LED positioned between the red LED and the green LED; 
 a first fins mounted on the light source of the light machine adjacent to the blue LED; 
 a fan assembly comprising a fan comprising a fan shell with an inlet and an outlet, and a second fins connected to the fan by one side thereof and mounted to the light source by another side thereof to align to the red LED; and 
 a heat dissipation module comprising a third fins, a fourth fins, and a heat pipe interconnecting the third and fourth fins; the third fins mounted on the light source to align to the green LED; and the fourth groups of fins mounted on the fan shell aligned with the outlet of the fan. 
 
     
     
       2. The projector of  claim 1 , wherein the heat pipe of the heat dissipation module comprises an evaporator section heat-conductively connected to the third fins, and a condenser section heat-conductively connected to the fourth fins. 
     
     
       3. The projector of  claim 1 , wherein the second fins of the fan assembly is aligned to the inlet of the fan. 
     
     
       4. The projector of  claim 1 , wherein the light machine further comprises a lens and a light modulating device; the light source and the lens respectively situated on opposite ends of the light modulating device. 
     
     
       5. The projector of  claim 4 , wherein the light modulating device comprises a housing and a digital micro mirror mounted inside the housing. 
     
     
       6. The projector of  claim 5 , further comprises a DMD heat sink mounted on the outside of housing of the light modulating device adjacent to the digital micro mirror. 
     
     
       7. The projector of  claim 4 , wherein the fan assembly is mounted on the circuit board; the fan is adjacent to the lens and the outlet of the fan faces towards the outside of the shell. 
     
     
       8. The projector of  claim 1 , wherein the shell comprises a first sidewall, a second sidewall opposite to the first sidewall, a third sidewall and fourth sidewall; the third sidewall and the fourth sidewall interconnect the first and second sidewalls; the red LED faces the blue LED and the fourth sidewall of the shell is behind the blue LED  333 . 
     
     
       9. The projector of  claim 8 , wherein the first sidewall of the shell defines a projection hole therein; and a plurality of ventilation window are respectively formed on the second, third, and fourth sidewalls of the shell. 
     
     
       10. The projector of  claim 1 , wherein the fan further comprises a connecting member interconnecting the fan and the second fins; the connecting members is shaped similar to the fan in profile and supports the fan on an surface of the connecting members. 
     
     
       11. A cooling device for a projector that comprises:
 a shell; 
 a circuit board installed inside the shell; and 
 a light machine mounted on the circuit board; the light machine comprising a light source which comprises a red LED, a green LED facing the red LED, and a blue LED positioned between the red LED and the green LED, 
 the cooling device comprising:
 a first fins mounted on the light source of the light machine adjacent to the blue LED; 
 a fan assembly comprising a fan comprising a fan shell with an inlet and an outlet, and a second fins connected to the fan by one side thereof and mounted to the light source by another side thereof to align to the red LED; and 
 a heat dissipation module comprising a third fins, a fourth fins, and a heat pipe interconnecting the third and fourth fins; the third fins mounted on the light source to align to the green LED; and the fourth groups of fins mounted on the fan shell aligned with the outlet of the fan. 
 
 
     
     
       12. The cooling device of  claim 11 , wherein the heat pipe of the heat dissipation module comprises an evaporator section heat-conductively connected to the third fins, and a condenser section heat-conductively connected to the fourth fins. 
     
     
       13. The cooling device of  claim 11 , wherein the second fins of the fan assembly is aligned to the inlet of the fan. 
     
     
       14. The cooling device of  claim 11 , wherein the fan assembly is mounted on the circuit board; the fan is adjacent to the lens and the outlet of the fan faces towards the outside of the shell.